1. Introduction Component Based Software Engineering (CBSE) is emerging as a paradigm for the development of large complex software systems. CBSE promises to yield cheaper and higher quality assembled systems by reusing configurable generic components that were developed separately [5]. UML 2.0 has extended and improved the representation of components and component-based systems. In UML 2.0, a...

In this paper, we propose an analytical model for component-based heterogeneous software architecture reliability and a method to find the solution for finding the optimal reliability of the overall software system according to the reliability of each component, the operational profile, and the architecture of software. Our approach is based on Markov chain properties and architecture perspecti...

The alignment between business processes and software is inadequately supported in conceptual modelling, although business processes are often the starting point for software development and define requirements for software systems. To address this gap, we connect the UML 2 profile for Event Driven Process Chains (EPCs) [2] with UML 2 elements representing software requirements and components. ...

The UML is used to detail high level software specifications that will be interpolated for XMI and XIS (XML Information Systems) as interchange formats based on XML. UML and XML are expected to be the next generation of modeling and data interchange standards respectively. In this paper, we describe the UML Profile for XIS architecture as a proposal for software development guided by UML models...

A highly linear Low Noise Amplifier (LNA) using a flexible feedforward linearisation scheme is described. The wideband LNA is designed for use in the frequency spectrum between 1 and 2GHz. It has a tuneable linearity profile which allows it to be adjusted for wideband moderate linearity or narrowband high linearity. The linearity can be tuned so a wideband Third Order Intercept Point (IP3) impr...

This paper reports on an ongoing object-oriented software measurement experiment which has been set up to monitor and evaluate team-based projects building OO software. The process, called the Software Assessment Through Ongoing Profile Sheets (SATOPS) which relies on manual form entries for recording measurement data in a project management framework is being automated using JAVA. The automate...

This paper proposes a method for optimizing bandwidth usage in Software Defined Networks (SDNs) based on OpenFlow. Flows of small packets presenting a high overhead, as the ones generated by emerging services, can be identified by the SDN controller, in order to remove header fields that are common to any packet in the flow, only during their way through the SDN. At the same time, several packe...

This article provides the stochastic and statistical framework to model software reliability in the presence of an operational profile. The software system is used under a randomly changing operational process so that the failure characteristics depend on the specific operation performed. The operational process describes, in a probabilistic sense, how the software is utilized by the users. The...

We consider a software reliability model where the failure rate of each fault depends on the specific operation performed. The software is tested in a given sequence of test cases for fixed durations of time to collect data on failure times. We present a Bayesian analysis of software failure data by treating the initial number of faults as a random variable. Our analysis relies on the Markov Ch...